Pneumatic Ball Valve Knowledge

1. Wear resistance; as the hard-sealed ball valve produced by Shanghai Watto Valve is spray welded with alloy steel, and the sealing ring is surfacing welded with alloy steel, the hard-sealed ball valve will not cause too much wear and tear when it is switched. (Its hardness coefficient is 65-70):

2. The sealing performance is good; because the seal of hard-sealed ball valves is manually ground until the valve core and sealing ring are fully matched. So his sealing performance is reliable.

3. The switch is light; because the bottom of the sealing ring of the hard-sealed ball valve uses a spring to hold the sealing ring tightly with the valve core, the switch is very light when the external force exceeds the pre-tightening force of the spring.

4. Long service life: It has been widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rocket and other sectors, as well as in people's daily life.

Pneumatic ball valve has compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and spherical surface are often in closed state, not easy to be eroded by medium, easy to operate and maintain, suitable for general working media such as water, solvent, acid and natural gas, mainly used for cutting off or connecting the medium in pipeline, also used for fluid regulation. Section and control.

Compared with other types of valves, pneumatic ball valves have the following advantages: angular stroke output torque, fast opening, stable and reliable, wide application, etc.

1. Thrust bearing reduces the friction moment of the valve stem, which can make the stem operate smoothly and flexibly for a long time.

2. Anti-static function: Spring is set between sphere, valve stem and valve body, which can derive the static electricity generated during the switching process.

3. Because PTFE and other materials have good self-lubrication and little friction loss with the ball, the service life of the pneumatic ball valve is long.

4. Low fluid resistance: Pneumatic ball valves are the least fluid resistance of all valve classifications, and even shrinkage pneumatic ball valves have relatively small fluid resistance.

5. Stem sealing is reliable: because the stem is only rotated but not lifted, the packing seal of the stem is not easy to be destroyed, and the sealing ability increases with the increase of the pressure of the medium.

6. Seating performance of valve seat is good: The sealing ring made of elastic materials such as PTFE is easy to seal, and the sealing capacity of pneumatic ball valve increases with the increase of medium pressure.

Advantages of Ball Valve

1. Fluid resistance is small, and the full-diameter ball valve has no flow resistance.

2. It has simple structure, small volume and light weight.

3. Close and reliable. It has two sealing surfaces, and the sealing surface material of the ball valve is widely used in a variety of plastics. It has good sealing performance and can achieve complete sealing. It has also been widely used in vacuum systems.

4. Easy to operate and quick to open and close.From full-open to full-close, only 90 degrees rotation is needed to facilitate long-distance control.

5. Maintenance is convenient, the ball valve has simple structure, the sealing ring is generally movable, disassembly and replacement are more convenient.

6. When fully open or fully closed, the sealing surface of the sphere and seat is isolated from the medium. When the medium passes through, it will not cause the erosion of the sealing surface of the valve.

7. It can be used in a wide range of applications, ranging from small to several millimeters in diameter and from high vacuum to high pressure.

8. The ball valve can be used in the medium with suspended solid particles because of its wiping property in the opening and closing process.High processing accuracy, high cost, high temperature is not suitable for use, such as impurities in the pipeline, easy to be blocked by impurities, leading to the valve can not open.